bobinson



v @Minh gratta atent ffice. i y

CHARLES FINDER AND DON C. ROBINSON,4 OLF LOWELL, MASSACHUSETTS.;

Laws .mem No. 70,356, dafedoaoba 29, 1867.

IMPROVED UAR-AXLE BOX.

T0 ALL WHOM IT MAY CON CERN Be it known that we, CHARLES BINDER and DON Ci RoBINSoN, both of Lowell, in the county of Middlesex, und State of Massachusetts, have invented new and` useful Improvements in Car-Boxes; and.we do hereby declare that the followingis a full and exact description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon.

The nature ofour invention consists in providing a car-box with four or more bearings, the object of which is to change the worn-out bearing, with the least inconvenience and loss of time, for a new bearing, without replacing a new box entire. 'It also relates to the chamber, formed through. the centre ofthe box, which cham- 1 ber serves to keep the working bearing cool, and also `is an aid in changing the box.

To enable others skilled in the art to maire and use our invention, we will proceed to describe its construction and operation.

Figure 1 represents a plan of our improved canbex with Your bearings.

Figure 2 represents a section through A and Bof tig. 1. a represents the box, b the cooling-chamber, c c c cV the Babbit linings, and d d d d the bearings..

Much inconvenienceexpense, delays, and danger to trains attend the Vusual boxes now used for car-axles.

First, the ordinary box, having but one bearing, when this is Worn out, melted, or destroyed by heat,'caused by friction, and not being properly lubricated, the box becomes Worthless, useless, and unserviceable, and valuable only to be remelted. Besides this, having but one bearing, the box suddenly giving out when the train is at a long distance from a repair-shop, the inconvenience and delay are often very great. And, further, it is continually liable to' heat when the train is running, 'for the want of a collar near its bearing.

In our improved car-box these several serious dilicu'lt'ies, to a great extent, are remedied. Each hearing, d d, in our car-box is equivalent and equal Vto an entire new box of the common ordinary kindnow in use.

i We construct our improved box a of one piece of' metal, of a suitable length, of any size, form, or shape. On its outside surface we form four or more bearings, d al d d, as may be desired. In these bearings d d d a', chambers are formed, which we fill or line with Babbit a c c a. We also form a chamber, b, through the entire length ofthe box a, as large as can be made without weakening or endangering theibreaking ofthe box a in its centre or thinnest part. This chamber I) acts as a cooler to the working bearing, as the air is constantly changing therein. And, further, this chamberb is useful and convenient for the engineer when short of time and a whole train stopped, in assisting in removing, with a proper instrument, the box a from the housing, and changing an old bearing for a fresh and new one, and replacing, the same.

The box a, being thus prepared, the engineer places the same in the housing over the axle-journal, its opposite side resting on a suitable bolster, or on its outside edges.' The bearing d being in Working contact:y with the running-journal of the axle, the duration of its Wear is longer than the common box, owing to the constant supply of cool air around the box a and in the chamber b. p

Thus it will be apparent, our boXa, having four bearings d d d d, gives four times the wear of the ordinary box, is easier changed when required, less danger to a train when-running, as there is less danger in melting the Babbit in the box, and, on the whole, cheaper, safer, and more durable.

What we claim as our inventionand desire tosecure by Letters Patent, isy A car-axle box, a, having bearing-surfaces d UZ d al, each being ready provided With Babbit or equivalent soft metal e, and arranged to be in turn placed in position for use, substantially' as described, and for the purpose set forth.

i W9 als@ clalm'th@ Cooling-Chamb .by in @Ombnton With the box a, for the purposes substantially as herein described.

CHARLES PINDER, DON C. ROBINSON.

Witnesses GEO. E. P Evnr, Annan PEVEY, 

